Web holding and guiding stopper



April 25, 1939. EN H 2,156,152

WEB HOLDING AND GUIDING STOPPER Original Filed May 19, 1937 INVENTOR.

'' GEORGE EFRENCH ATTORNEY.

Patented Apr. 25, 1939 UNITED STATES.

WEB nommvcr AND comma STQPPER George Frederick Fren assignor to Thomas ch, Manchester, England, French 8: Sons Limited,

Manchester, England, a corporation of Great.

Britain Original application May 19, 1937, Serial No.

143,556. Divided and this application December 29, 1937, Serial No. 182,181. In Great Britain July 27, 1935 6 Claims. (Cl. 139-291) This invention refers to webbing composed of two band-like lengths of woven material joined at intervals by cross tapes. One example of such webbing is that used in Venetian blinds, and another example is that called pocket tape, and used inside helmets for holding strips of cork or pith. P a

The present application is a division of my copending application, Serial No. 143,556, filed May 9 19, 1937. This application is closely related to my copending application Ser. No. 67,809, filed March 9, 1936.

In the weaving of ladder or like webbing, the webbing passes through a device called a stop- 5 per which serves to support and guide the web'- bing as it passes forward to the breast beam and to its take-up and delivery rollers at the front of the loom and into the work box.

The previously known stopper consists of a stout metal rod bent at right angles to its length at one end to form an open-ended U-shaped loop, through which the webbing passes, and at another part fixed to the breast beam of the loom. Such known stopper has several drawbacks, but mainly that it allows the webs to work out through the open side of the loop, thus causing bad weaving, aswell as allowing the webs to project beyond the width of the cloth in the loom batten, such drawbacks also causing long stoppages of the loom to correct the weave. A

further drawback is that the loop part of the stopper does not hold the webs close together, especially at the time and point of the beat' up, which results in slack weaving and, in the case of ladder and like webbing,results in the' afore-. said excessive portions of'the'warp threads of the cross tapes being left unwoven, and necessitating the subsequent cutting away or trimming by hand of the surplus warp threads when separating the outer bandings fromeach other. A further fault of the known stopper is that it is only supported at one side, and its opposite side is free to move and get out of line with the loom batten. It is also incapable of yielding bodily if and when struck by the loom batten.

A further object of this invention is a construction of stopper and stopper-supporting means by which the foregoing drawbacks are eliminated. In the accompanying drawing, constituting a part hereof and in which like reference characters indicate like parts,

Fig. 1 is a plan view showing a portion of the breast beam of a loom for making ladder webbing, with the stopper of the present invention in #35 place thereon Fig. 2-is a cross-sectional view thereof taken along the line 2-2 of Fig. 1; Y 7

Fig.3 is a perspective view of the stopper shown in Figs. 1 and 2 removed from the loom;

I Fig. 4 is a view similar to Fig. 3 of a modified 5 form of stopper showing a diagonally placed slot in one of the faces thereof;

I Fig 5 is a plan view similar to Fig. 1, showing aresilient mounting for the rods'which supportthe stopper; and a Fig. 6 is a fragmentary plan view of the stopper, showing a modified form of supporting rod. As indicated in Fig. 1, there is shown the beam l, constituting a part of the breast of the loom,

and rods 2 and 3. threaded through openings 4.15 and'5 respectively, and held in place by nuts 6'. The rods 2 and 3 extend forward a substantial distance and then are curved inwardly at I and 8 respectively, terminating in reduced, small ends 9 and I0 respectively. The stopper II, as best 20 shown in Fig. 3, has an upper and lower fiat face l2 and [3, with the sides 14 and I5 closed and having a narrow slot oropening l6 extending therethrough. On each of the sides of said slot is an opening l-I, slightly larger in diameter than 25 the ends 9 and III of rods 2 and 3 for the reception of said rods to be held loosely in place. The several sets of threads 18, l9, 20 and 2| converge from the loom itself and approach the slot N5 of the stopper II and the weaving of the webbing '30 takes place immediately in front of said slot. By reason of the divergence of threads l8, I9, 20 and 2|, and the fact that they are under tension .in the loom, there is a component of force tending to press thestopper n in the direction of the 35 breast beam of the loom, thereby holding it pos- I itively in place on the rods 2 and 3. The woven ladder webbing 22 passes out of the loom in the direction of the arrow 23.

A modification of the stopper is shown in Fig.

- 4, wherein the upper surface 12 is provided with a diagonally placed slot'2l, providing an. opening whereby the woven webbing 22 may be removed from slot "5 without disturbing the align- 45 ment of the parts. Y

R In Fig. 5 a different type of mounting is shown,

wherein the rods 2 and 3, instead of being rigidly mounted as shown in Fig. 1, have their ends I and 5 passing. through the breast beam I and being 5 held .from displacement by nuts 25 and 26. On

' the opposite end of said breast l and surrounding each of the rods 2 and 3 is a spring 21 held in place by a pin or other means 28. This provides a. resilient mounting, but one which in the strike some of said threads, all of which might tend to produce defective weaving. In order to overcome this possible disadvantage, a still further modified form of supporting means for the stopper has been provided. In this case, instead of two rods 2 and 3, there is provided but a single rod 29 (Fig. 6), one end of which-is attached to the breast beam of the machine in any desired manner, and the other end of which is bent inwardly at 30 with the extremity or tip'3l of the rod 29 touching the approximate center of the stopper II at a point either below or above the woven band 22. There need be no additional contact between the rod 29 and thestopper II. In operation, because of the tension of the diverging threads l8, I9, 20 and 2i, there is a force tending to push the stopper against the tip 3| of the rod 29 and to hold it in place. In addition,

,if by reason of an accidental blow or otherwise,

there is a tipping of the stopper H, it will immediately come back freely to its normal position, and thereby there will be avoided any interference between the shuttles and the warp threads.

The two webs, as they are woven, pass through the stopper from the heald side, and thence over the breast piece to the take-up and delivery rollers and work box.

With the stopper fitted to and held by the rod or rods in a position such that its forward longi- I so tudinal side lies near to the fells of the webs and with the slot comparatively narrow and its upper and lower sides flat and parallel, it holds the two webs firmly and closely together during each beat-up of the weft, which results in tighter weaving, and it cooperates with the healds in reducing the dwell and giving a longer bindingin of the cross tapes. To permit of the webs being removed from the stopper without disturbing their connection with the take-up roller, say when requiring to inspect the inside or underside of the webs, the upper thickness of the stopper may, as shown in Fig. 4, be formed with an opening, preferably diagonal, through which the websmay be withdrawn, and through which they. may be passed back again into'the stopper after inspection. Alternatively, the stopper may be removed bodily from the rods and slid along the webs. The opening in the st per also allows of the stopper being used to a chor the loose weft after reshuttling and the broken warp ends after being drawn in.

To afford a yieldingc'ontact of the-stopper if and when struck by the loom batten, therods may be fitted with coiled springs, see Fig. 5, whichyield on the stopper being struck by the batten,

but otherwise hold it in its normal forward position. I

By reason of the slot in the stopper being closed at the ends next the'sides of the stopper, the"- webs cannot leave the stopper sideways, as in the known stopper.

Lastly, it will be seen that by reason of the tighter weavingof the webbing due to the altered heald motions, the increase in the length of each binding in, the reduction in length of the loose warps and weft between the binding in, and the firmer hold on the webbing at the fells, a much firmer and stronger construction of webbing is obtained.

What I claim is:

l. Ina loom for weaving webbing, a web holding and guiding stopper comprising a member having therein a narrow, flat channel closed on all faces, through which said web is adapted to pass and a diagonal slot in said stopper to allow 'the removalof said web.

2. In a loomfor weaving webbing, a web holding and guiding stopper comprising. a member having therein a narrow, flat channel closed on all faces, through which said web is adapted to pass and means for resiliently attaching the said stopper to said loom to allow yielding thereof, the direction of said yielding being the direction of travel of the web being woven.

3. In a loom for weaving webbing, a web holding and guiding stopper comprising a member having therein a narrow, flat channel closed on all faces, through which said web is adapted to pass and a slot in one of the faces of said stopper to allow removal of. said web.

4. In a loom for weaving webbing, a web holding and guiding stopper comprising a member having therein a narrow, flat channel closed at the sides, through which said web is adapted to pass, rods extending into the respective sides of said stopper, the opposite ends of said rodsbeing secured in the breast beam of said loom, said stopper beingdetachably secured to said rods and being removable therefrom by shifting said ing and guiding stopper comprising a member having therein a narrow flat channel closed at the sides, through which said web is adapted to pass,

a support secured to thebreast beam of said loom and extending-to said stopper, said support con-,

tacting with said stopper at a point below said webbut unattached to said stopper on the side thereof opposite the threads being woven, said stopper being held in said contact by the pressure of the converging threads being woven.

GEORGE FREDERICK FRENCH. 

